Clutch pressure plate and flywheel refacing and honing tool



CLUTCH PRESSURE PLATE AND FLYWHEEL REFACING AND HONING TOOL Filed May 7, 1948 2 Sheets-Sheet 1 x 1 l E l L J INVENTOR.

Q, Q Q Q Char/6s Me/zar' Johnson m myzam ea Dec. 20, 1949 c. M. JOHNSON 2,491,565

CLUTCH. PRESSURE PLATE AND FLYWHEEL REFACING AND HONING TOOL 2 Sheets-Sheet 2 Filed May '7, 1948 INVENTOR. Char/es Me/zordo/vnson ATTORNEYS u a S Patented Dec. 20, ,1949 V d 2;, 2

UNITED" STATES mew] Dimes CLUTCH PRESSURE PLATE AND FLYWHEEL REFACING AND HONING TOOL Charles Melzar Johnson, Burlington, N. 0.

Application May 7, 1948, Serial No. 25,628

Claims. (01.51-241) This invention relates to refinishing and honvention consists of the new and useful combinaing tools for pressure plates and fly-wheels of tion, construction and arrangement of parts,- as motor vehicle clutches, wherein the parts may be hereinafter more fully described, set forth in. the refinished without removing the motor or fiyclaims appended hereto and disclosed in the acwheel, and in particular the invention relates to 5 companying drawings forming part hereof, an arbor with a supporting bar and plate by which wherein: it may be attached to the fly wheel housing and Figure 1 is a view showing a longitudinal secclutch cover, respectively, and upon which grindtion through the fly-wheel housing of a motoring stones may be mounted for refacing the vehicle clutch with the grinding tool bolted thereclutch plate and clutch surface of the fly-wheel. to and with the housing and power actuating de- The purpose of this invention is to provide a vice shown in dotted lines. portable tool for refacing, refinishing and hon- Figure 2 is a view showing a side elevation of mg the plate and clutch surfaces of the fly-wheel the grinding wheel with" a' plate providing a of a motor vehicle clutch inwhich the tool'may Washer positionedthereon. I be attached to the housing and cover without Figure 3 is a detail showing a mounting bar removing the motor or fly wheel. i by which the tool is attached to the fly-wheel In the usual motor-vehicle clutch, the clutch housing. surface of the fly-wheel and clutch plate wear, Figure 4 is a longitudinal section through the and in some clutches the rivets out grooves in the clutch cover with the grinding tool mounted working faces, thereby causing failure of the thereon, wherein the clutch cover and the power clutch in a comparatively short time. In some actuating device are indicated in dotted lines vehicles, the pressure plate and fiy-wheel are and the arbor and grinding stone are shown in apparently in perfect condition; but, upon examelevation. ination, they are found to be out of true, allowing Figure 5 is a detail showing the mounting plate only part of the surfaces to make contact. With for holding the tool to the clutch cover. l only a small amount of wear, it is hardly advisable Figure 6 is a view showing a side elevation of to remove the motor and the fly-wheel, which is the tool, with a dressing tool in combination a costly repair job, and with this thought in mind, therewith. this invention contemplates a portable tool that Referring now to the drawings wherein like may be readily bolted to the parts, whereby the reference characters denote corresponding parts, defective surfaces may readily be refinished at the clutch refinishing tool of this invention incomparatively low cost. eludes an arbor H], a fly-wheel housing mounting The object of this invention is therefore to bar H, a clutch cover mounting bar [2, grinding provide a comparatively inexpensive portable tool wheels 13 and M, and a washer l5. for refinishing pressure plates and fly-wheels of The arbor H3 is provided with a flange l6, clutches, without removing the fiy-wheel or against which the grinding Wheels [3 and Mare motor, a held by a nut I! with the washer l5 against the Another object of the invention is to provide a wheels. The nut is threaded on the intermediate portable tool for refinishing motor vehicle clutch portion I8 of the arbor on which the grinding pressure plates and fly-wheels in which interwheels and flange are also mounted and the changeable grinding stones are used on a comouter end of the arbor is provided with a stem mon arbor for grinding the different parts. H], to which a power-actuating device 29 is at- Another object of the invention is to provide an fi as shown in ures 1 and 4. arbor adapted to accommodate grinding stones of In the design shown in Figure l; the arbor is different sizes and means for attaching the arbor rotatably mounted in the bar l through a bearto the clutch cover and fly-wheel housing of a ing 6 n a recess 2!, and the bar is Secured y motor-vehicle clutch, so that with powerapplied b01118 22 and 23 Which are positioned in p s to the arbor, the pressure plate and clutch sur- Z4 d 5, in the ends of the bar to e y-W eel face of the fly-wheel may be refinished. housing, as indicated by the dotted lines 26. The A further object of the invention is to provide 5 bolts 22 and 23 are threaded into the usual stud a portable tool for refinishing the working surpe ill the fi h 0f the h usin faces of a motor-vehicle clutch that may be With the parts positioned in this manner, the bolted to the housing of the part, which is a comgrinding stone l3 contacts the clutch surface 2! paratively simple and economical construction. of the fly-wheel, and the stone is resiliently held With these and other objects in view, the in- 56 against the surface by a spring 28 on the arbor as it is rotated. The bar I l accurately positions the stone, so that the surface 21 will be ground smooth and true.

In the design shown in Figure 4, the stone i3 is replaced by the grinding stone 1% which corresponds with the face 29 of the pressure plate 39 of the clutch and the arbor is mounted in a cylindrical post 3| through a bearing 32 in a recess 33 in the post. The post is provided with a threaded stud 34 that is threaded into an opening 35 in the plate 12 and the plate is mounted on the clutch cover 36 through studs 31 and 38, which are threaded in openings 39 and 49 in the ends of the plate I2, respectively.

In this design the power-actuating element 29 is applied to the outer end of the arbor l6, and as the arbor rotates, the grinding or emery wheel I4 refinishes the surface 29 f the pressure plate.

The tool is also provided with a dressing tool as illustrated in Figure 6 in which a diamond point 41 on the end of screw 42 is mounted in a bar 43 having a handle 4d at the outer end and the bar is slidably mounted in a socket 45 in the post 3!. With the parts arranged in this manner, the wheel 14 may be rotated by the power-actuating device 29 through the arbor l6, and as the wheel rotates, the dressing tool or point 41 may be moved across the face thereof to true up the working or grinding face. The dressing tool may also be used with the stone I3 shown in Figures 1 and 2.

With this tool, the clutch surface of the flygrinding wheels bolted to the housings,'the clutch surfaces will'be ground true.

It will be understood that modifications may be made in the design and arrangement of the parts without departing from the spirit of the invention.

What is claimed is:

1. A portable clutch refinishing tool comprising an arbor having a flange spaced from one end thereof and a stem to which power-actuating means is applied on the other end, a grinding wheel positioned on the arbor and against the flange, a washer positioned against the opposite surface of the grinding wheel, a nut threaded on the arbor clamping the grinding wheel against the flange, a mounting plate adapted to be bolted to the clutch housing, a post having a ball bearing socket in the outer end carried by the mounting plate for rotatably mounting the arbor on the mounting plate.

2. A portable clutch refinishing tool comprising an arbor having a flange spaced from one end thereof and a stem on the other end for receiving power-actuating means, a grinding wheel positioned on the arbor and against the flange, a washer positioned against the opposite surface of the grinding wheel, a nut threaded on the arbor clamping the grinding wheel against the flange, a mounting plate having a threaded centrally disposed opening and bolt holes in the outer ends for bolting the mounting plate to the clutch housing, and a post having a ball bearing socket in the outer end and a threaded stem positioned in the centrally disposed threaded opening of the mounting plate for ro-tatably mounting the arbor on the mounting plate.

4 3. In a refinishing tool for a clutch having a centrally disposed bearing and a clutch face in a plane perpendicular to the axis of the bearing, a spindle having one end positioned for mounting in the bearing of the clutch, a grinding wheel carried by the spindle and positioned to engage the said clutch face with the end of the spindle in the bearing of the clutch, a mounting plate positioned on the spindle and having bolt holes in the ends thereof, and a bearing in said mounting plate in which the spindle is journaled in said plate, said spindle having an extending stem for receiving power actuating means.

4. In a refinishing tool for a clutch having a centrally disposed bearing and a clutch face in a plane perpendicular to the axis of the bearing, a spindle having one end positioned for mounting in the bearing of the clutch, a grinding wheel carried by the spindle and positioned to engage the said clutch face with the end of the spindle in the bearing of the clutch, a mounting plate positioned on the spindle and having bolt holes in the ends thereof, a bearing in said mounting plate in which the spindle is journaled in said plate, said spindle having an extending stern for receiving power actuating means, and a spring positioned on the spindle between the said mountingplate and grinding wheel for urging the grinding wheel against the face of the clutch.

5. In a refinishing tool for a clutch having a centrally disposed bearing and a clutch face in a plane perpendicular to the axis of the bearing, a spindle having one end positioned for mounting in the bearing of the clutch, a grinding wheel carried by the spindle and positioned to engage the said clutch face with the end of the spindle in the bearing of the clutch, said spindle having a flange thereon against which the grinding wheel is positioned, a backing plate positioned against the outer surface of the grinding wheel, a nut threaded on the spindle for locking the grinding wheel and backing plate against the flange, a mounting plate positioned on the spindle and having bolt holes'in the ends thereof, a bearing in said mounting plate in which the spindle is j ournaled in said plate, said spindle having an extending stem for receiving power actuating means, and resilient means on the spindle between the said mounting plate and nut urging the grinding wheel against the face of the clutch.

CHARLES MELZAR JOHNSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

